I have a M700 VLS 22-250 with a 1:14 twist and have found the following loads-
My rifle seems to prefer Varget for the 50 gr BT and RL15 for the 55 gr BT and 60 gr PT bullets.
I've been trying to find a load with the heavier bullets and need to continue my load development. This is at least a starting point for you.

I got a new model 12BVSS for christmas 22-250 w/ 1-12 twist 26". Did some load testing this past tuesday with varget & H380 55gr sbks & 55gr nosler bts best load so far is 55 gr noslers over 32.5gr varget with cci br2 primers and remington brass.Tested from 31gr-36gr of varget with both bullets but this combo was shooting .2s and .3s at 110yds.I've been wantin to try some A maxs and 52gr smks.
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One caveat with these ball powders: they can be very temperature sensitive. I had to pull a lot of warm 22-250AI/H414 loads that had shot beautifully here in the cool spring, but nearly blew primers in the summer heat of the western prairie.

I know this is a well known problem, but I discounted it until I actually experienced it.:o Something to keep in mind, anyway.